Xeon E 2186M 's Advantages
Released 5 years and 4 months late
Higher specification of memory (2666 vs 3)
Newer PCIe version (3 vs 2)
Higher base frequency (2.9GHz vs 1.9GHz)
Larger L3 cache size (12MB vs 8MB)
More modern manufacturing process (14nm vs 32nm)
Opteron 3320 EE 's Advantages
Lower TDP (25W vs 45W)